Trick Room Sweeper

Victini @ Life Orb or Leftovers
![Victini][1]
Brave Nature(+Atk, -Spd)
Evs:252 Atk / 252 SDef / 4 HP or 252 Atk / 252 HP / 4 SDef
Trait:Victory Star
-V-Creation
-Bolt Strike
-Zen Headbutt/Brick Break
-Trick RoomThis guy can work amazing well as a trick room sweeper. With V-Creation as a powerful STAB that lowers your Speed as well it makes it even better. Zen Headbutt is another amazing STAB that can also make the opponent flinch and the lower accuracy is taken care by Victini's Ability.Brick Break if you dont want a freaking heatran to come in and wall you but I stil think Zen Headbutt is the better option in the end. Fusion Bolt is coverage and Trick Room is there for obvious reasons.
[1]: http://sprites.pokecheck.org/i/494.gif

Victini and sun go together like bread and butter. I've used CB Victini in the sun before, and when you do that, V-create demolishes everything. This time I wanted to use a Victini that'd last a bit longer, and maybe get a sweep, as opposed to obliterating something on the switch, then retreating. The solution was Flame Charge Victini. With base 100 speed, Victini easily has enough speed for a sweep at +1 (Or +2 should the chance to FLame Charge again present itself), where it can use it's STAB Blue Flare to mow down opposing teams, while Focus Blast takes Dark types and Heatran. One huge perk to the set is that Victory Star boosts the accuracy of both Blue Flare and Focus a last, meaning they less less often than usual, which is extremely helpful. The last moves lot is your choice of Psychic for secondary STAB and the ability to hit Tentacruel, or HP Ice to stop him from being walled by Dragonite, Salamence, and the Lati twins. Just make sure you run it in sun, as Blue Flare hits like a ton of bricks when under sun. Some might say that Volcarona is better, and they'd be right, but Victini isn't walled by Heatran and is insanely fun to use.

I didn't suggest TR > Flame Charge because there were already some TR sets here, and I think that under sun, TR can work against faster members of the team, notably the team's Chlorphyll a user, assuming it's used in sun.

Thunder is the point of putting this guy in rain, he has that interesting balanced out stat spread, with THUNDER. The typing is relatively good for stopping Grass types from taking out your water types ( Politoed, Any hydration user, Kabutops, etc. ) V-create has 180 freaking base power, with STAB. Rain isn't hurting it too bad, while you're still getting a fighting force agains't crap like Scizor. Psyshock is STAB, and it deals physical damage. While U-turn is a scouting force, that hurts some, and can be used agaisn't weakened grass types, that you switched in on.

Outspeeds and KOs Xatu, both Regis, Donphan and all Weather Changers with Final gambit. Zoroak and Serperior both outspeed it, but can be KOed by Focus Blast and Searing Shot respectively. Rhyperior cannot be KOed by Final Gambit, but can be KOed by Grass Knot.

energy ball:covers rock,ground and water weakness
fire blast:very powerful,full accuracy by victory star and wide lens
psychic:powerful,may reduce sp.defense
thunderbolt/thunder:both are powerful but there is a little problem with thunder's accuracy-deals with water and fire types

Same strategy as my Chandelure set, but with less power, no Shadow tag, but with more bulk and accuracy. Inferno paired with Victory Star, Wide lens and Telekinesis gets good accuracy, while Psychic is STAB. Charge beam gets full accuracy, and the SAtk boosts allows me not to be walled by Blissey/Chansey.

Thunder Wave puts the status down on your opponent, which is super annoying to deal with. He then sets up Light Screen to support his own bulk and the bulk of his team mates. He can now U-turn away and let another team mate screw over whatever your opponent is using. A great team player.

V-create is also good STAB since you have Thunder Wave to slow your opponent down.

The EVs are a bit weird, but... what did you expect?
HP maximizes bulk, the rest is to give him a little bit of edge.

Victini

I love this guy, but I think maybe he should not have two Fire-type signature moves, maybe they should have made Searing Shot a Psychic-type move to make life easier, but unfortunately, they didn't. The other thing about Victini is that he should have the ability Levitate, but he doesn't. I still like Victini, but Game Freak should have added these two things. Anyway, here is my moveset.

Item: Fire GemV-Create obviousPsychic STAB, and unlike other movesets, Victini needs a move of its primary typeEnergy Ball covers Water, Ground and Rock. U-Turn Against Dark Types and can save Victini for a foe that is worthy.

If you were able to go to the Japanese event that was from December 2012 to January 2013, you were able to get Victini with

V-Create
Bolt Strike
Blue Flare
Glaciate

Bolt Strike and Blue Flare only have 85% accuracy so with Victory Star ability it goes up to 93.5% accuracy, but base power of 130 and 20% chance of causing paralysis or burn. You could give it Wide Lens item to boost accuracy by another 10% so it will never miss.